Experimental Analysis of Compressive Strength of Concrete with Different Regenerated Fine Aggregate Substitution Rate
In this paper,the difference of compressive strength of concrete under different regenerated fine aggregate substitution rate and dif-ferent water-cement ratio was tested and analyzed.The results show that the 7-day compressive strength of concrete decreases with the increase of the replacement rate,and the 28-day compressive strength increases with the increase of the replacement rate,but the effect is not signifi-cant.Under the same conditions of water-cement ratio,the 28d compressive strength of recycled concrete shows an overall decreasing trend with the increase of the replacement rate of recycled fine aggregate.When the replacement rate of recycled fine aggregate is less than 50%,the 28d compressive strength of concrete decreases,but the decrease is not obvious,and the value is always within the requirements of GB/T 50107-2010"Standard for Inspection and Evaluation of Concrete Strength".
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